

ABSTRACT

A,A-DISUBSTITUTED-B-PROPIOLACTONE HAVING THE GENERAL FORMULA 2-(O=),3-R1,3-R-OXETANE WHEREIN R AND R1 ARE SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, STRAIGHT- OR BRANCHED-CHAIN ALKYL GROUPS OF FROM 1 TO 10 CARBON ATOMS, SUBSTITUTED OR UNSUBSTITUTED CYCLIC HYDROCARBON GROUPS OF FROM 6 TO 10 CARBON ATOMS, OR WHEREIN R AND R 1 JOIN TO FORM A RING OF FROM 6 TO 10 CARBON ATOMS, ARE EFFECTIVELY STABILIZED AGAINST PREMATURE POLYMERIZATION DURING STORAGE BY INCLUDING IN ADMIXTURE THEREWITH A STABLIZING AMOUNT OF A HYDROQUINONE MONOALKYL ETHER HAVING THE GENERAL FORMULA 4-(R2-O-)-PHENOL WHEREIN R2 IS A STRAIGHT-, BRANCHED-CHAIN, OR CYCLIC ALKYL GROUP OF FROM 1 TO 10 CARBON ATOMS.

- EFEiiSii/E PUBLFLQATiUN unirni STATES PATENT AND TRADEMARK OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, S63 0.G. 687. The abstracts of Defensive Publication applications are ident fied by distinctly numbered series and arearranged chronologically. Theheading of each abstract indicates the number of p I specification, including claims and sheets of drawings contained in the application as originally filed. 'ihe files of those n1 motions are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication appiicationshnve not been examined as to the merits of alleged invention. The Patent and Trademark Oifice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JULY 1, 1975 T936,003 STABILIZATEON 0F u,a-DISUBSTITUTED- fl-PROHOLACTONES Winrlell C. Watkins, 1605 Auburn Drive, Longvicw, Tex.

75601, and James J. Ward, Rte. 1, Box 1083, Henderson, Tex. 75652 Continuation of abandoned application Ser. No. 205,763, Dec. 7, 1971. This application May 2, 1974, Ser. No.

Int. Cl. C07d 3/00 U.S. Cl. 260-8433 No Drawing. 10 Pages Specification a,a-Disubstituted-B-propiolactone having the general formula R1 Ri3-(]J=O let-0 wherein R and R are selected from the group consisting of hydrogen, straightor branched-chain alkyl groups of from 1 to 10 carbon atoms, substituted or unsubstituted cyclic hydrocarbon groups of from 6 to 10 carbon atoms, or wherein R and R join to form a ring of from 6 to 10 carbon atoms, are effectively stabilized against premature polymerization during storage by including in admixture therewith a stabilizing amount of a hydroquinone monoalkyl ether having the general formula Ell I-i HOC/ CO-R II HII wherein R is a straight-, branched-chain, or cyclic alkyl group of from 1 to 10 carbon atoms. 

